Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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Technical Field And Industrial Applicability
Of The Invent:Lon
[0001] The present invention relates generally to a
mirror assembly and more particularly to a remote
controlled crossview mirror.
Background Of The Invention
[0002] Mirrors have been known to man for many
centuries. The mirrors made by the ancient Greeks and
Romans were mostly made from polished bronze, but glass
mirrors were also known. During the middle ages, a
process for backing glass with a thin layer of silver
and steel was developed. This enabled the rising
middle class people to acquire mirrors.
[0003] Today, mirrors are used in a variety of wide
ranging applications such as astronomy, space ships,
solar devices, vehicles, microscopes, satellite
communication devices and medicine. Perhaps the best-
known application for mirrors, are mirrors for motor
vehicles.
[0004] Motor vehicles require mirrors in order to
provide the driver or operator of the vehicle, the
widest possible field of view around his vehicle. This
is done for safety purposes since most vehicles, due to
structural obstructions, have "blind spots" which
prevent the driver from seeing any object that may come
near the front, rear or sides of the vehicle. For
years, the automobile designers have attempted to
eliminate these blind spots when designing vehicles.
Unfortunately, this objective can never be achieved
because of the design of the motor vehicle. Thus, it
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has been found necessary to mount mirrors in and around
the vehicle to enhance the field of view of the driver.
[0005) One early attempt to enhance the operator's
rear field of view is disclosed in U.S. Patent No.
2,969,715 to Moseby. Moseby increases the driver's
field of view by mounting a very large rear-view mirror
to one side of the vehicle. Whsle this increased the
field of view, it presented other undesirable
structural and safety problems.
[0006] Another attempt to overcome this problem is
disclosed by Fellmeth, U.S. Pat. No. 2,778,273, issued
January 22, 1957. Fellmeth uses a mirror with a flat
intermediate portion and a convex edge portion. He
mounts the mirror adjacent to the left-hand front door
or operator's door so that objects proximate to the
side, bottom and rear of the vehicle are reflected in
the curved and convex peripheral portion of the mirror.
Objects, in the far distance rearward, however, are
reflected in the medial flat portion. This mirror
construction also presents other structural and safety
problems.
[0007] West in U.S. Patent No. 2,911,177, issued
November 3, 1959, discloses a generally spherical
segment-shaped reflecting panel with a flat part insert
therein.
[0008) King in U.S. Patent No. 3,104,274; Kalutich
in U.S. Patent No. 3,170,985 arid Tobin in U.S. Patent
No. 3,389,952 are further examples of convex rear-view
mirrors that are used in combination with larger flat
mirrors to enhance the rearward view of the operator of
the vehicle. However, all these aforementioned designs
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have inherent safety and structural problems in that
the mirrors generally project a substantial distance
outwardly from the vehicle.
[0009) Jenkins in U.S. Patent No. 3,003,396, issued
November 10, 1961, discloses a convex rear-view mirror
that is mounted inside the vehicle. Jenkins modifies
a convex rear-view mirror by gradually increasing the
curvature at the ends. This curvature substantially
minimizes the distortion of objects. Unfortunately,
Jenkins still does not provide a wide enough field of
view to eliminate many or most of the blind spots in
front of, on the sides and to t:he rear of the vehicle.
[0010] None of the aforementioned prior art mirrors
have been successfully employed in school buses to
reduce "blind spots" in front of the vehicle. Thus,
the National Safety Council has reported 58,000 annual
school bus accidents occurring nationally in 1977 and
1978 and approximately 165 fatalities per year. A
Kansas Department of Transportation study of these
national school bus fatalities pinpoints the
contributing factors. From 1975 through 1978, 73
percent of the fatalities were among homeward bound
pupils; 60 percent of the pupils were killed by the bus
itself; and 47 percent were 5 <~nd 6 years old. These
statistics indicate that enhancing the driver's view in
front of and around the vehi<:le could reduce these
fatalities.
[0011) One mirror that has been designed to reduce
blind spots in front of a vehicle such as a bus is a
crossover mirror . Crossover mirrors have been designed
and mounted to the front corner of the bus to provide
the driver with visual access t:o the area in front of
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the bus that is hidden from direct view as well as to
the sides of the bus. Currently available crossover
mirrors are required to see a particular forward,
rightward and leftward visual orientation in front of
school buses as mandated by EMVSS (Federal Motor
Vehicle Safety Standard) 111. Under FMVSS 111, the
school bus builder certifies mi:r_ror compliance using
the eye ellipses of a 25th percentile women driver when
the school bus is sold. However', when the school bus
enters service, the mirror must be manually adjusted
rightward or leftward depending upon the individual bus
operator.
(0012] Manual adjustment, unfortunately, is a time
consuming process that typically requires two people -
one inside the bus and one adjusting the mirror -- to
ensure proper adjustment. Further, if the process is
not performed properly, blind spats may occur in front
of or along the side of the vehicle.
Summary Of The In~rention
[0013] It is therefore an object of the present
invention to provide an easier method for adjusting a
crossover mirror for use on a vehicle such as a school
bus.
[0014] The present invention addresses this object
by providing an electronically controlled crossover
mirror controllable by the operatcar from the cab of the
vehicle. An electronic controller preferably mounted
to the dashboard of the cab rE=gion of the vehicle
coupled to an actuator within the mirror allows the
mirror to swivel clockwise or counterclockwise about a
vertical mounting reference. This allows the mirror to
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be adjusted rightward or leftward as seen by the
operator of the vehicle to ensure the minimization of
blind spots in front of and a=Long the side of the
vehicle. Properly adjusted mirrors will add greater
safety to the children who ride the bus every day.
[0015] Other objects and advantages of the present
invention will become apparent upon considering the
following detailed description and appended claims, and
upon reference to the accompanyi:ng drawings.
Brief Description Of T'he Drawings
[0016] Figure 1 is a perspective view of a school
bus having a mirror assembly according to one
embodiment of the present invention;
[0017] Figure 2 is a perspective view of a mirror
assembly according to o.ne embodiment of the present
invention;
[0018] Figure 3 is a section view of the mirror
assembly of Figure 2 in the dire<~tion of the arrows 3-
3;
[0019] Figure 4 is a sectional view from the front
of a mirror assembly according to one embodiment of the
present invention;
[0020] Figure 5 is a cross-~;ectional view of the
mirror assembly of Figure 4 in the direction of the
arrows 5-5; and
[0021] Figure 6 is a perspective view of an
electronic controller according to another embodiment
of the present invention.
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Detai~.ed Description And Preferred
Embodiments Of The 7_nvention
[0022] Referring to FIG. 1, a motor vehicle 10,
preferably a school bus, has a hood 12 and front
fenders 14 and 16. Alternatively, the motor vehicle is
a truck, recreational vehicle, va:n, station wagon, car,
or any other similar vehicle. The hood 12 often causes
a large area in front of the sc]zool bus to be hidden
from direct view of the driver sitting in the cab area
17, particularly in view of its height from the ground.
Heretofore, children have been ~_njured or killed when
standing in this area as the bus moves forwardly.
[0023] To address these problems, mirror mounting
supports 18 and 20 are mounted on the fenders 14 and
16. The mounting supports 18 are preferably hollow.
Thereafter, elongated, arcuate mirror assemblies 22
and 24 are mounted on the supports 18 and 20 and with
the mirror assemblies positioned so that the driver can
see the hidden area in front of the school bus 10 and
the areas alongside the school bus 10 clearly and with
minimum distortion from the cab 17 during bus
operation. Preferably, the mirror assemblies 22, 24
are mounted such that the "blind spot" behind each
mirror 26 is fully disclosed in i=he other mirror.
[0024] Each of the mirror assemblies 22 and 24 are
preferably similar to one another. However, they may
take on a variety of different configurations. The
mirror assembly 22 is shown more particularly in
Figures 2-5 and in one embodiment includes an elongate,
arcuate mirror 26 having a reflective surface 46 with
a generally convex shape throughout. The mirror 26 is
mounted in a frame 28 having a curved back plate 30 and
turned in edges 32. The edges 32 are turned over the
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edges of the mirror 26 with a suitable vinyl or rubber
layer 34 there between.
[0025] As best seen in Figures 4 and 5, the mounting
support 18 extends within a tubular portion 40 of the
curved back plate 30 and is secured to a mounting clamp
52 via a bolt 54 or some other suitable fixation
device. The mounting clamp 52 is preferably a plastic
material such as nylon and has a base portion 54 that
seats an electronic actuator 56.
[0026] An electronic actuator 56 is seated on top of
the tubular portion 40. Brackets 36 are affixed to the
curved back plate 30 and extend outwardly in generally
parallel relationship where they receive a bolt 38 that
couples the brackets 36 to the e_Lectronic actuator 56.
[0027] The electronic actuator 56 is coupled to an
electronic controller (shown as 58 in Figure 2 and 158
in Figure 6) contained within the cab area 17 of the
vehicle 10 via electric leads f0. The leads 60 are
preferably extended through the hollow mounting support
20 and within the hood 12 of the vehicle 10 to the cab
area 17. The electronic controller 58 is contained
within the dashboard region of the cab area 17 and
within easy access of the driver of the vehicle 10.
[0028] Each mirror assembly 22, 24 is mounted to the
respective fender 14, 16 so that the reflective surface
46 has a fixed up and down visual orientation (along
the y-axis or vertical adjustment?. However, through
use of the coupled electronic controller 58 and
electronic actuator 56, complete electronic adjustment
of the mirror assembly 22 rightward or leftward
(corresponding to a counterclockwise or clockwise
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adjustment, (i.e., horizontal adjustment) of the mirror
assembly 22) is obtained by the operator within the cab
area 17 without the need for external assistance. This
allows complete field of vision to the area in front
and to the side of the bus 10 for any vehicle operator.
[0029] To accomplish this counterclockwise or
clockwise adjustment about a horizontal plane, the
electronic controller 58 is used by the operator in the
cab area 17 to control the electronic actuator 56 that
adjusts the mirror assembly 22, 24 in a rightward and
leftward direction.
[0030] As best shown in Figure 3, the electronic
actuator 56 pivots, or swivels, clockwise or
counterclockwise about a horizontal plane in response
to an electronic signal sent from the electronic
controller 58 via electric leads 60. The actuator 56
pivots about a center point 80 defined by the length of
the tubular portion 40 and mounting support 20, which
remain stationary. The pivoting of the electronic
actuator 56 in turn causes the coupled arcuate mirror
26 and curved back plate 30 to pivot in response. The
amount of pivoting of the mirror assembly 22 about the
center point 80 is restricted in an about horizontal
plane direction internally within the actuator 56 to an
amount corresponding to a predetermined angle a. The
angle a is a comparison of the relative orientation of
the mirror assembly along a vertical plane 70 in a
first position, corresponding to a centered position,
and a second position, corresponding to a
counterclockwise most pivoted position defining a
vertical plane 70A or clockwise most pivoted position
defining a vertical plane 70B.
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[0031] The vertical plane 70, 70A; 70B, as shown in
Figure 3, is defined as by a vertical plane extending
from the corners 77, or outermost. edges, of the curved
back plate 30 through the center point 80. Preferably,
the complete range of angle a is limited to about 45
degrees when comparing the mirror assembly 22 in the
centered position with either the counterclockwise most
or clockwise most position.
[0032] The electronic actuator 56 describes any type
of remotely controllable electronic motor that can
swivel, or otherwise rotate, clockwise or
counterclockwise about a horizont;~l plane about a fixed
vertical center point 60 as will be understood by one
of skill in the art. One preferred electronic actuator
56 (shown in Figures 4 and 5) and electronic controller
58 (shown in Figure 2) combination that meets these
requirements is a servomotor 56 electronically coupled
to a toggle switch type controller 58. In this
embodiment, the depressing of the toggle switch 92 by
the operator in a leftward or rightward direction
within the cab area 17 induces an electronic signal to
be sent to the servomotor. The servomotor 56
interprets the electronic signal and generates a direct
current within its coupled magnetic coils (not shown)
in response to the electronic signal. The direct
current creates a magnetic field that induces a shaft
portion (not shown) of the servomotor 56 to rotate
clockwise or counterclockwise in response to the
magnetic field. The arcuate mirror 26 and mirror
assembly 22 are then adjusted rightward or leftward in
response to the this rotation to improve the field of
vision in front of and to the side of the vehicle 10.
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(0033] The movement clockwise or counterclockwise is
limited in two distinct ways. First, the operator may
simply return the toggle switch 92 to its normal
position if the mirror adjustment is satisfactory.
Second, the servomotor 56 itself may have a limiter to
restrict the clockwise or counterclockwise rotation of
the mirror assembly 22 as described above corresponding
to angle a.
[0034] Another preferred electronic actuator 56 that
may be used is a stepper motor electronically coupled
to an appropriate controller (shown as 158 in Figure
6). Most steppers, as they arcs also known, can be
stepped at audio frequencies, allowing them to spin
quite quickly. With an appropriate controller,
preferably a dial controller 158, they may be started
and stopped '°on a dime" at controlled orientations.
Thus, in this preferred embodiment, the operator turns
the dial 160 of dial controller 158 clockwise or
counterclockwise to a desired position. An audio
signal is sent to the stepper motor as a function of
the dialed position. The stepper motor receives the
audio signal and rotates clockwise or counterclockwise
to a precise location in response: to the audio signal.
As one of ordinary skill apprec_Lates, the controller
158 itself has a built in rotai~ion-limiting feature
that is dependent upon the number of allowable dial
positions. of course, while the preferred embodiments
as described above in Figures 4 and 6 represent two
preferred actuators and controllers for controlling the
movement of the mirror 26, any number of other types of
actuator devices may be utilized.
[0035] The present invention addresses problems with
typical crossview mirrors found in the prior art by
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allowing the arcuate mirror 26 to be adjusted rightward
or leftward as seen by the operat-or of the vehicle l0
to ensure the minimization of blind spots in front of
and along the side of the vehicle 10. This adjustment
takes place within the cab area 17 of the vehicle 10.
Thus, additional personnel are not required in aiding
to adjust the mirrors. Properly adjusted mirrors will
add greater safety to the children who ride the bus
every day.
[0036] While the invention has been described in
terms of preferred embodiments, it will be understood,
of course, that the invention is not limited thereto
since modifications may be made by those skilled in the
art, particularly in light of the foregoing teachings.
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